Means for blowing automobile-horns.



,possible to so regulate adjust-ing the spring 1t) and set-screw 2t) as cured between the outer edges ot the plates 6, so as to constitute with said plates an airtight piston.

11 isthe plunger-head, and 1") 12 .12 are airinlets in the upper metal head 2.

13 is an air-inlet in the lower metal head 3, and 14 is a lexible flap-valve. adapted to normally close said inlet.

15 is an outlet-pipe secured to the lower head 3, and 16 a screw Y-thrcaded nipple at the outer end thereof tor securing?)v thereto the usual flexible tube, 17 being a valve-tube inclosing a ball-valve 18, provided Ywith an adjusting-spring 19 and sometimes occurring ywith horns of this nature that it too sudden a blast be given the reed fails to operate, such a valve making` it the. outtlow ol' air by to obtain the best results.

23 is a screw-threaded neck supporting a. regulating-screw 2a, having,- a milled operating-head 25.

The operation will be obvious, it beine apparent that the chautl'eur or user only: need apply his foot to the head 11 of the toot-plun ger 7, causingr the piston to be, tort-ed suddenly forward against the torce of the retractile spring 10, thereby forcing the air out ot' the pump by way otl the outlet-pipe 15 through the tlexible connecting-tube to the horn 22. l/Vhen the foot is removed from the.

'head 11, the spring,l 1t) restores the piston to its normal position, and the valve 11 allows of; the admission ot sutlieient air Within the pump through the air-inlet 123 to suppl)Y the place ot that which was formerly forced lor- Ward to tho valve and horn. At the same time the air which was drawn in through the air-inlets 12 behind the piston is again forced out through said inlets. Should it be l'ound that the reed ot the horn 2; tails to operate upon too sudden a blast. from the. piston, ree;- ulation may be ell'ected by adjusting the setscrcw 20 so as to diminish the. pressure of the adjusting-screw 2t), it'

regulating-spring 19 upon the ball-valve 18. For thepurpose of regulating the loudness ot' the noise made b v the horn the YtloW of air nia)vv be increased or diminished as desired by the regulating-screw 24 and milled head 25,

tl aving thus described my invention, what I claim, and desire to secure by Letters Patent.o1` the United States, is-

An automobile-alarm embracing the tollowing elements: an air-pump having a cylinder open atl both ends; two heads therefor provided with longitudinal bolts adapt-ed 'to secure said heads` irlnly against the ends of the cylinder, said heads being provided with legs or extensions tor securing the pump .in

place; a piston located within the cylinder n and secured at the approximate center o1e a plunger one end otl which extends through one evlinderdiead and constitutes operating means tor the toot ol" the user, the other end thereof extending through the opposite' cylinder-head; a spiral springl surrounding the latter portion ot' the plunger and resting one end against the cylinder-head and the other against the piston 5 an air-inlet in one cylinder-head and air-outlets in the other; in Cornbination with a reed-horn connected to the cylinder by `an outlet-pipo having a bal-lvalve seated in a valveseat connected with the outlet-pipe and provided with adjustable means l'or varyinihr the flow of air therethrough; .together with a regulating-screw located also in theontlet-pipe, the arrangement beine such that the reed ot' the horn will vibrate l'or sudden pressures of the piss ton and the loudness thereof maybe regulated as desired.

ln testimony whereof 1 have signed :ny name to this specification in the presence of two subscribiner witnesses.

GEORGE 1V. 'l'.tllldlll.

Witnesses:

G. A. Vanoiuuf l. ll. lit-nanou. 

